D dingdong New member Dec 2, 2009 #1 1. Simplify: 84 + (-99) + 44 - (-18) - 43? 2. Simplify: (8 - 2)(3 -9)
C Cakes New member Dec 2, 2009 #2 A plus and a minus equal a minus. Two minuses equal a plus Any time you see + (- something) just treat it like a minus sign. And - (- something) is the same as + So the problem is 84 - 99 + 44 +18 - 43
A plus and a minus equal a minus. Two minuses equal a plus Any time you see + (- something) just treat it like a minus sign. And - (- something) is the same as + So the problem is 84 - 99 + 44 +18 - 43
